Transcript Homework 3:
Homework 2 Part I: Drug Resistance and the Three Great Pandemics Drug-Resistant Malaria • Download “Drug Resistance and Malaria” by Peter Bloland, published by the WHO: http://www.who.int/csr/resources/publications/drugresist/malaria.pdf • Using this reference as your guide, answer the questions on the following pages. Drug-Resistant Malaria 1a) According to the report, which species of Plasmodium parasites have developed drug resistance? 1b) Which region of the world is experiencing the most significant problem with drug resistance? Drug-Resistant Malaria 2a) What would be the yearly cost of treating every malaria infection on earth with the least expensive single-agent antimalarial? (Note: use the WHO’s low-end estimate of global incidence, and assume that one treatment per patient will suffice) 2b) And the yearly cost for the least expensive combination therapy? 3) In one sentence each, describe three strategies to prevent anti-malarial drug resistance. Drug-Resistant HIV The use of combinations of antiretroviral drugs has proven remarkably effective in controlling the progression of human immunodeficiency virus (HIV) disease and prolonging survival, but these benefits can be compromised by the development of drug resistance. Resistance is the consequence of mutations that emerge in the viral proteins targeted by antiretroviral agents. In the United States, as many as 50 percent of patients receiving antiretroviral therapy are infected with viruses that express resistance to at least one of the available antiretroviral drugs. NEJM 350:1023-35, 2004. Drug-Resistant HIV One new technology developed to decrease the development of resistance is described in the following NPR report: http://www.npr.org/templates/story/story.php?storyId=5554167 4) How might this particular development reduce the risk of drug resistance in the developing and developed world? Drug-Resistant TB • Access the following CDC Weekly Report: Emergence of Mycobacterium tuberculosis with Extensive Resistance to Second-Line Drugs --Worldwide, 2000--2004 http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5511a2.htm#tab1 • Answer the questions that follow. Drug-Resistant TB 5a) Define MDR and XDR tuberculosis. 5b) In 2004, which two regions of the world had the highest percentage of TB isolates classified as MultiDrug Resistant? 5c) In 2004, which countries had more MDR isolates classified as XDR than any other? Drug-Resistant TB 6) How does one attempt to treat MDR-TB? (Hint: Refer to the Weekly Report’s Editorial Note and to your lecture notes). Part II: Cardiovascular Disease Cardiovascular Disease • The Framingham Heart Study was a monumental project not only for cardiovascular disease, but for all of science, health, and medicine. • Answers to the following questions may be found at the study’s website: http://www.nhlbi.nih.gov/about/framingham/ Cardiovascular Disease 7a) What was the initial purpose of the Framingham study? 7b) List 5 definite risk factors for heart disease, and the year in which they were found to be associated with an increased risk. Cardiovascular Disease • For the final question, you will need to complete the interactive tutorial on Coronary Artery Bypass Graft (CABG) surgery: http://www.nlm.nih.gov/medlineplus/tutorials/co ronaryarterybypassgraft/htm/index.htm Cardiovascular Disease 8a) What non-surgical therapies are recommended before resorting to CABG? 8b) What unclogged vessels are used to form the “bypass”? What are the specific side effects associated with harvesting these vessels? Cardiovascular Disease 8c) How does the patient remain alive while the heart is stopped for surgery?